It is preventable but if they would go in to the healthcare field a needle prick is no fault of their own could lead to hiv a friend at school injured in a sports or playground injury that has hiv one scarry thought blood brother or blood sisters (finger prick with the same needle) that scares me to death in adulthood rh negitave women get the rogram shot its a blood bi product and you have to sign a waver because the risk of getting hiv is small but you can still get it there are other ways of getting hiv its not just a std I honestly would have to think hard before getting it or turning it down